Remove deprecated Expect from the libraries.

tests/language/super_operator_index7_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Test for unresolved super[] and super[]=.
 
+import "package:expect/expect.dart";
+
 class A {
   var indexField = new List(2);
 
   noSuchMethod(InvocationMirror im) {
     if (im.memberName == '[]=') {
       Expect.equals(2, im.positionalArguments.length);
       indexField[im.positionalArguments[0]] = im.positionalArguments[1];
     } else if (im.memberName == '[]') {
       Expect.equals(1, im.positionalArguments.length);
       return indexField[im.positionalArguments[0]];
@@ skipping 17 matching lines @@
     Expect.equals(3, super[0] += 1);
     Expect.equals(3, super[0]);
     Expect.equals(3, super[0]++);
     Expect.equals(4, super[0]);
   }
 }
 
 main() {
   new B().test();
 }